Antimicrobials and Resistance Practice Questions
20 free Antimicrobials and Resistance practice questions for the USMLE Step 1, each with the correct answer and a detailed explanation. Open any question below, or take the full set as an interactive quiz.
Questions
20 questions
All Antimicrobials and Resistance questions
- Q1. A patient treated with vancomycin for MRSA develops increasing MIC values over time. Which resistance mechanism is most likely?
- Q2. A patient on gentamicin develops ototoxicity. Which factor increases this risk?
- Q3. A patient is prescribed imipenem. Why must cilastatin be co-administered?
- Q4. A patient taking tetracycline is advised not to take it with milk. Which mechanism explains this interaction?
- Q5. A 25-year-old woman with UTI is prescribed TMP-SMX. Which pathway does this drug combination inhibit?
- Q6. A patient treated for pneumonia develops Achilles tendon rupture. Which antibiotic is most likely responsible?
- Q7. A man develops C. difficile colitis after broad-spectrum antibiotic use. Which drug is most appropriate?
- Q8. A patient on linezolid develops bone marrow suppression. What is this drug’s mechanism?
- Q9. A patient with syphilis is allergic to penicillin. Which alternative antibiotic is appropriate?
- Q10. A man receiving rifampin notices orange discoloration of body fluids. What additional effect should be monitored?
- Q11. A patient treated with isoniazid develops peripheral neuropathy. Supplementation with which vitamin prevents this?
- Q12. A patient on aminoglycosides develops nephrotoxicity. What is the primary mechanism?
- Q13. Why are aminoglycosides ineffective against anaerobic bacteria?
- Q14. A patient with gonorrhea is treated with ceftriaxone. Which resistance mechanism could compromise treatment?
- Q15. A patient taking macrolides develops prolonged QT interval. What is the primary mechanism of macrolide action?
- Q16. A patient with MRSA is started on daptomycin. Why should lung infections not be treated with this drug?
- Q17. A 7-year-old child is being considered for doxycycline. Why should this drug be avoided?
- Q18. A patient treated for TB develops orange urine and elevated LFTs. Which drug is responsible?
- Q19. A woman develops a rash after taking ampicillin for a sore throat. She is later diagnosed with mononucleosis. What explains the rash?
- Q20. Clavulanic acid is added to amoxicillin to achieve which effect?